Electric type-writing telegraph apparatus.



G. c; CLARK.

ELECTRIC TYPE WRITING TELEGRAPH APPARATUS.

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1,124,704, Patented Jan. 12, 1915.

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ELECTRIC TYPE WRITING TELEGRAPH APPARATUS.

APPLICATION FILED PiIKZB, 1910.

Patented Jan. 12, 1915.

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ELEGTEIG TYPE WRITING TELEGRAPH APPARATUS.

APPLICATION FILED FEB.28, 1910.

1,124,704. Patented Jan. 12,1915

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. CLARK.

ELECTRIC TYPE WRITING TELEGRAPH APPA PIATUS.

APPLICATION TILED 1113.28, 1910.

Patented Jan. 12, 1915 8 SHEETS-SHEET 4.

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1 ,124,704. Patented Jan.12, 1915.

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APPLICATION FILED FEBZB, 1910. 1,124,704. Patented Jan. 12, 1915.

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G. G. CLARK. ELECTRIG TYPE WRITING TELEGRAPH APPARATUS.

APPLICATION FILED FEB.28,1910.

Patented Jan. 12, 1915.

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G. G. CLARK. ELECTRIC TYPE WRITING TELEGRAPH APPARATUS. AYPLIGATION IlLBD FEB.28,1910.

1,124,704. Patented Jan. 12, 1915.

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GEORGE C. CLARK, 0F FBUITVALE, CALIFORNIA, ASSIGNOR 0F FOUR-FIFTHS TO W. H.

MAXSON, OF OAKLAND, CALIFORNIA, AND CHARLES A. GRAHAM,

CALIFORNIA.

OF NEVADA CITY.

ELECTRIC TYPE-WRITING TELEGRAPH APPARATUS.

Patented Jan. 12, 1915- Application filed February 28, 1910. Serial No. 546,424.

To all whom it may concern:

Be it known that I, GEORGE C. Cha m, citizen of the United States, residing at Fruitvale, in the county of Alameda and State of California, have invented new and useful Improvements in Electric T ype- VVriting Telegraph Apparatus, of which the following is a specification.

M invention relates to an electrical type writing machine and telegraphic transmitting and receiving apparatus.

The object of the invention is to proi'ide a page printing telegraphic machine conr bining in a single instrument the features of transmitter, receiver and recorder. and arranged to operate through a relay over a one wire circuit.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which-- Figure 1 is a perspective view of the typewriting machine employed in the system. Fig. 2 is a schematic view representing the system. Fig. 3 is a perspective view, partially diagrammatic,- of the operating parts and electrical circuits of said machine. Fig. l is a cross-section through the same. Fig. 5 is a detail in vertical section of the. oscillating type-bar. Fig. 6 is an elevation of the type-bar and shifting mechanism. Fig. 6 is a sectional view on the line M--M of Fig. 6. Fig. 7 is a top plan View of the printing plate and commutator segment, with certain parts of the apparatus broken away. F ig: 8 is a front view of the type segment or printing plate. Fig. 9 is a back View of the inking pad. Fig. 10 is a view in partial section. partially diagrammatic. of the carriage-return mechanism. Fig. 11

a detail of the loose spring gear forming part of the device shown in Fig. 10. Fig 12 standard arranged keyboard having the keys 2. each key of which is an electrical switch which controls the operation and recording of the transmitting machine, and simultaneously transmits through the relay 3 to the line i the necessary currents that automatically control the receiving machine at the opposite end of the line. It will be understood that the sending and receiving machines are precisely alike, and interchangeable, as will be hereinafter more particularly pointed out. The principal structural features of the invention involve, in addition to the keyboard mentioned, a universal, oscillating, rocking type-bar 5 which carries a segmental printing plate (3, and is also provided with a traveling spring contact arm 7 operative over a segmental commutator surface the number of the commutator sections of the segment 8 corresponding to the number of keys on the keyboard, and each of which sections is in direct electrical com munication with a key on the keyboard.

99 represent" opposed field magnets for oscillating the type-bar. 10 are correspond ing armatures for the magnets 9-9' carried by the type-bar .11 is a printing magnet for rocking forward the type-bar to cause the type-face on segment 6 to" print on the platen 12.

Means for shifting" vertically the typebar, to enable different cases on the typeface to print, will be described later, as willlikewise the carriage-return, automatic inking of the type-face, and other details of the machine.

13-44 are electrical switches for changing the instrument from transmitter 0 receiver, and vice versa.

The electrical principle of control which I employ is a single impulse from the main line battery, or other source of energy. of either positive or negative polarity, and of variable duration and of two strengths, first weak and then strong; one strength to prepare the system for printing, and the other strength to effect the printing. That is to say. starting with a weak strength, the first part of the current impulse sent over the main line 4 will be either of positive or negative polarity. according to the position of the key depressed on the keyboard; all keys on the left hand of the center of the keyboard being adapted to send positive impulses to the line. and all keys to the right of the center of the keyboard to send negative impulses to the line. If the initial weak current is of positive polarity, it first passes through the coils of the relay 3, and thence out over the line through the coils of the receiving relay 3. Fig. 2, thence to ground, returning to the negative pole of the nrtin line battery at the sending end of the system. If the current is of negative polarity the direction is reversed, and the current goes first to the ground and returns by way of the relays to the positive pole of the battery at the sending end of the machine. The action of this first weak part of impulse in the relays of both instruments is to close a local battery circuit of the same polarity as the main line, energizing the positioning fields 99'. and turning the type segments of both sending and receiving machines in unison to the proper position directly in front of the platen on both machines; in so doing, moving the arm 7 of each machine to right or left, according to negative or positive local impulses sent, across the commutator The moment, however, the brushes on the arm 7 come into contact with the commutator segment on its respective commutator corresponding to the key depressed, there is instantly established a. shunt circuit from the local battery in the transmitting machine that energizes the printing magnet 11 in the sending machine, and at the same moment cuts in an extra battery to the main line, thus raising the current of the main line impulse from Weak to strong. Simultaneously there is a further action in the relays 3-3' due to this reinforced or extra main battery current pass ing through the main line, and a circuit is established from the local battery of the receiving machine through an extra or shunt circuit to the printing magnet of the receiving machine, energizing the said printing, magnet and tilting or rocking forward the universal type-bar, and causing its typeface to print against the platen of the receiving machine; printing the same character represented by the key depressed in the sending machine.

This in a general way represents the operation of my system, and I shall now describe more in detail the means by which these various circuits are established, and results produced. As before stated, the keys on the left hand of the center of the keyboard, when depressed. are adapted to send positive impulses to the main line wire 4, while all keys to the right of the center of the keyboard, when depressed, are adapted to send negative impulses to the line. The reason for this division ,will be apparent hereinafter. For convenience, I shall refer to the keys on the left as the positive keys, and the keys on the right of the keyboard as the negative keys. Each bank of keys 2, as shown in Fig. 4, acts on a universal bar 15,

of the machine.

and all these bars 15 for one-half of the key board are secured in end frames, one of \vhich'is shown at 16, Fig. 4'; each pair of end frames 16 fulcrnniing on a rod ii' which extends across the machine. That is to say, all the positive or left-hand keys act on one set of universal bars 15) carried by their individual frame, and allthencgativeor righthand keys act on another set of universal bars 15 carried by their individual frame: so that no matter which right-hand or tuft-- hand key is depressed, it will act through one or the other of its universal b if to rock a respective frame and corrcspondingly close certain main line battery circuits. Each of these frames carries a projectii-ig arm (this arm being marked 1% for the .positive or left-hand keys. Fig. Li. and

" l8" for the negative or ri hthand keys) the movement of each arm being limited by a set-screw 1%), Fig. -ii-. Each arm 18 18', Figs, carries an insulated adjusting screw JO- 20 which acts on one member ifl or 2] of a switch interposed in the main line bat-- tery circuit. The other member of this switch is represented at on the left hand of Fig. 3, and by 22' on the right hand of Fig. 3; the switch member 22 being con nected by wire 23 with the negative pole of the main line bz'ittery i4, and the switch member 22 being connected by the Wire 25 with the positive pole of the main line bat tery 24. The switch members QL-Ql' are grounded by the respective wires :26-E27. Each pair of contacts 20-2l, 20'21 are normally held apart by suitable means, as the springs 23, acting on the frames 16 to lift the latter when pressure is released on the key. Each of these frames 16 with its universal bars 15 is independently operable to close aa'espective circuit and send a negative or positive impulse o er the main line wire. All the universal bars 15 on the lefthand side of the machine are insulated from the rest of the machine by suitable means. as by inter-posing in the frame 16 at some point between the bars 15 and fulcrum 17, a suitable insulation 29. The universal bars on the right-hand side of the machine are similarly insulated from the rest of the n1achine.

The positive end of the main line batterv 2-1 is connected through wires 25-30 with a contact 31 which is arranged in the path of a contact member 32 carried on the rocking frame 16 on the positive or left-hand side This contact 32 is in electrical connection with the fulcrum rod 17, and this fulcrum rod 17 is electrically connected by the wire 33 leading to the coils of the relay 3 in the main line 4.. COI'IK spondingly the negative side of the main line battery 24 is connected by the wire 23 with a contact 31, which latter is in the path of a contact 32 carried by the righthand or negative rocking frame 16. llence it will be seen that each key on the lefthand side of the machine, when depressed. will causr its rocking frame l6. to close two mucus. one at il zi'. and the other at I-li ilZ: and similarly. the depression oia negative or ruilmbanrl lrey will close two switches of the main line battery circuit at ii 22. Zl--h'4". Each positive key when le n'essed. partially closes another circuit atthe contacts l -35; the contact 34 being carried by the lacy, and the Key being in electrical connection by a wire 36 which leads to the wir 3? on the positive side of the local battery circuit. the. local lmttery being rernesenied M38. The contact 35 for this particular hey is connected by a wire 39 with conducting section it) on the comn'iutator segment 8. The number of these conducting sections on this segment corresponds to the number of keys on the keyboard, and each section M) is insulated from every other section and rom the main metallic portion 41 of the segment 8. At each end of the segment 8 are two insulated sections E ail, sh -43, sections -i".."-----i-3 and i2-*l3 being insulated one from the other and from the rest of the segment. One pair of these sections 42- -43 are for the purpose of operating the motor 4 1 which effects the carriage return. and the other pair of these sections 42 -43 connect with the shift-key 45 on the keyboard, by which the position of the type segment is shifted vertically. The operation of this type shift and. the carriage return will be described later.

The swinging arm 7 which is carried by the universal type-bar has two brushes 46-47, one of which, 46, is adapted to travel in electrical contact over the sections 40-42%2, and the other brush, 7, to travel over the rear metallic contact sections 4l43-43. Normally the arm 7 stands on the center section 40 of the segment. as shown in Fig. 3, which is a neutral position, and when this arm 7 is in this central, neutral position, if the bar 5 should be rocked forward on its pivots 48 the typeface on the printing plate 6 would not print; this being the position of the parts when the spacer-bar 49 is struck. hen ever the arm 7, however. is swung to right or left, so'as to stand on one or other of the sections 40, and a circuit is closed through a section 40, brushes 46-47. and plate 41, the bar 5 will be rocked forward on its pivots 48 to cause the type on the printin plate 6 to print; all as will be more 0 early understood shortly.

The turning of the type-bar 5 to right or left to carry the arm 7 over the commutator segment 8 depends on whether a righthand or left-hand key depressed. The

(lOs'Q-s a riicuit to .IOKZh the armature 50 of the relay to the. left. Depressing neg-i1 the or right-harm key turns the arm 7 to the right. Thus, referring to Fig. 3, when :1 lifrsinnrl or positive hey is depressed, switches 3; and iid") are closed, and the insiin line ciriinit through battery 2% is closed. the current flowing from the posithe end o the l'mttery 2A through wires :1 al wnch Ill- .12. bar 17, wire 33, to u. out er the main line toground in receiving macl'iinr. up through the Y and hire 26 in the sending machine, througlia switch 2l--22 and Wire 23 to he neuatirecnd of the battery 24. If a rightianrl or negative key 2 is depressed, iine circuit is closed by the U and the current Zil---;*LL". the positive end of the battery ,7 wire 25, switch 22'-21, 'wire 1 t ground. and returns over the main line t. hrough the relay 3, wire 33, switches 5-.;"- -91 and wire 23, to the negav A .ilhiil (,llii mi tin battery. Thus it will be sern that by iiepri Jig a left-hand or positive he a posiiixe impulse is sent over the main line and the return is through ground. while ii a right-hand or negative inipi'ilse emitrolling-key is depressed, the current goes from the'receiving machine through the ground and returns over the main line as a negative impulse. If a posi: the impulse sent out over the line by the depression of a positive or left-hand key 2, the arr "Euro 50 of the relay 3, which is of the poia. and type, is rocked to the left. If a negative or right-hand key is depressed, the i-cwise travel of the current through the main line i will correspondingly rock the :n-inature 50 to the right.

The rocking motion to the right or left of the arm 7 on the universal bar 5 is con trolled by the right or left movements of the armature 50, and the printing by the machine due to the forward oscillation of the type-bar 5 on its pivots 48 is ejl'ected in the re eiving machine by intensifying at the proper moment the current passing tl'nouggjh the main line. so as to move the arn'mture 0 farther than normally to right or left. which will also be apparentlater.

The armature 50 has a spring tongue ex tension 5i. with its points normally out of contact with. but movable between, a pair of contacts 52----53.'to which the Wires 5i55 leading to the field magnets 99' connect. The relax armature 50 connects by the wire 37 with the positive end of the local battery 38. The negative pole of this local battery 38 connects by a wire 56 with a pair of spring contacts 57. Ordinarily in the arrangement shown in Fig. 3, the negative pole of the local battery 38 is electrically connected with both terminals 52-53 i im- 4. rhe contacts 57 and wiire 56;

but a movement in one (lirection or the other of the armature 50 will cause the spring tongue 51 to contact with one or the other of the terminals 52 a3, bread-ring its conned tion with 57, but closing the local battery circuit thrmigh the aruuiiure and spring tongue 51. no if a positive impulse is sent out over the main line, arnmture is rocked to the left, and the local battery circuit is closed, through wire 37, armature In), spring tongue 5i, contact wire :31, left-brunt field magnet Ll, right-hand tield magnet 5), Wire 55, contact 53, Contact 57, wire 56. to negathe pole of local battery $58. This or ergizing of the field magnets by a positive impulse rocks the arm 7 to the lctt, cans ing the brush it; on the arm 7 to trave our the commutator sections lt lying to the left of the center or the segment. Similarly, the depression of a right-hand or ncgiitivc key on the keyboard to cause a negative impulse to traverse the main line results in the rocle ing of the armature 50 to the right. closing the local battery circuit tin-(nigh wire 37, armature 50, spring tongue fil, contact 53. wire 55, magnets J t wire 54 contacts Fin--57, wire 56, to the ncgatire pole of the local battery; the field magnet armature 10 being correspondingly attracted. and the arm 7 moved to the right. Thus it is seen that the oscillation of the field armature's 10 and arm 7 is controlled primarily by the switches 2l--22, 31--32. or '21 Q2.

3132; while the printing magnet con trolled by the key switch 3l----35 or 3-l----' :35.

If the arm 7 moves to the left its movement continues in that direction until the brush 46 comes over the section it) which corresponds to the key dep essed. lunncdi lately thereupon a circuit is closed as follows assuming that a left-hand or positive key has been depressed: from he '2 through wires 36----3T, to positive pole 5 local battery 38. The local battery current passes through these two wires. tl'irough the key 2, complementary contacts 3l 35, wire 39, sec tion 40. brushes 46-47, rear section 41 of segment 8, wire to printing magnet 11, thence through wires 61 to the negative end of the local battery circuit. This completing of the circuit through the printing magnets 11 by closing the switch 3l35 immediately results in the attraction of an armature 62 surrounding and in which the universal type-bar turns, causing the typebar to rock forward and print. If a negative or right-hand key is depressed, theoporation is similar, except that the field mag net armature 10 and arm 7 are rocked in the opposite direction. The moment, however. that the printing coils 11 are energized by the closing of the switch 3l---3f and before the universal type-bar 5 of the send ing machine can rock forward, a sensitive armature 63 is attracted by one of these coils, this armature. 63 being so constructed as to break a short circuit in the main line and to cut in extra cells 64-, in the main line battery. so that a strong impulse will be sent out o'i'er the line for the purpose iall()!tl h; be described.

As sren in Fig. 5, the shunt circuit con trolling armature 63 is connected by wire (if with the negative end of a set of cells in the battery 24. This armature is also one member of a switch which is n1ovable between a pair of contacts 666T. Normally a spring (38 holds the armature ($3 in contact with the switch member 67, breaking it with member 66. Contact menilicr (ii is connected by a wire 9 with the positive end of another set of cells in the main line battery; Thus it will be seen that ordinarily the act of cells (3 1; is cut out, and the cuircnt that passes through the main line limiter-y passes around the cells, 64., through wirev contact 67, armature 63, and wire 65. The contact t ti with which the armature 63 counts when coil 11 is energized, is connected by a wire T0 with one terminal of the set of cells 6%. so that it is seen that energizing coil ll, attracts armature 63 and breaks the shunt circuit through wires )65 and cuts in the extra of cells 64: so that the strength of current that can pass over the main line will be equal to all the cells in the battery; the course of the current through the battery now being over Wire 70, contact 66, armature (33, and wire 65. The effect of thus cutting in the extra set of cells 64 is to cause a sudden intensification of the current passing over the main line -l. and the effect of this intensified current reacts through the relay coils 3. Fig. 2, ol' the sending machine to attract its armature 50'. Fig. 2 farther toward one or the other of the magnets 3", according to whether the impulse sent over the main line is negatiie or positive.

As before stated. it a left-hand key is de pressed to send a positive impulse over the main line wire, the armatures 50 and 50' of the sending and receiving machines would be rocked to the left. This rocking of the armature to the left by reason of the current passing over the main line, so long as the extra set of cells 64 isoizt of commission, results only in the closing of the local batter circuit to energize the positioning fields of the two machines and start the commutator arm swinging in the correct direction. The momenthowever. that the ,extra setof cells 64 is cut in, the intensified tun-rent passes through the relays of both the machines. and causes the armatures 50 and 50 of both machines to be more strongly attracted. so that the spring tongues 5151" (which we will assume are already in contact with contacts 52-52) bends and causes a contact 72 on the stiff part 0' iii the armatures to engage a corresponding fixed contact 73. Each armature 50--50 carries a left-hand contact member 72 and a right-hand contact member 74; coacting with correspondin fixed contacts 73-75. The contacts 73- 5 in each machine are connected together and to a switch member 7676. In the sending machine of Fig. 3, the switch member 76 is shown as thrown on the contact 7 6 which is connected with wire 37 of the local battery 38. 11Ch is the position of the switch member 76 in the sending machine at the left of Fig. 2. In Big. 2, the receiving machine at the right shows its switch member 76 thrown in the opposite directiom or oil. In each machine the button of switch member 76 or 76 is connected by a wire 78 with the wire 59, which latter has been described as connected with the electrical conducting segment 41 of the commutator 8.

It will be manifest that the moment an impulse is sent over the main line i, so as to rock the armature 50 of the receiving machine to the left, the local battery circuit leading to the printing magnets 11 is closed by the switch H -73. The moment these magnets 11 are energized, the universal type-bar of the receiving machine is rocked forward to print just as has been described in conjunction with the sending machine. The purpose of this additional strength current through the main line to cause the spring arm of the armature 50' of the receiving machine to bend, so as to bring the contacts 72- 73 of the receiving machine together, is to cut in the printing magnets of that machine automatically; this cutting in or closing of the printing magnet circuit in the sending machine being done by the manual closing of the switch Eli--35. In other words, in the sending machine the local circuit leading to the printing magnets 11 is closed at 3i--35 by depressing the key. The same circuit in the receiving machine has to be done automatically, and I adopt the means of the spring tongue 51 and contacts 72-73 and Y t-75 to accomplish this. Of course. it is understood that both machines are precisely alike and interchangeable, and are to be used interchangeably, and while the spring arm 51 of the armature so of the sending machine bends and brings the points Ti -73 together, it cuts no figure, because the local printing circuit has already been closed at Mes--35 by the manual depression of the key.

From the foregoing it is seen that the function of the polarized relays i-l il is to receive the delicate initial main line impulses of either positive or negative polar ity, depending on which direction the cur rent flows through the main line, and trans fer their action to the strong local battery,

thereby producing local current impulses of the same polarity and duration as the main line impulses, but of one intensity; the main line current impulse being of two strengths, the first part of the impulse being weak in intensity and acting upon the receiving relay to close its local battery circuit by way of a circuit through the positioning fields 9-9 of the receiving machine, so as to place the type segment in position to print the proper character' The last part of this same main line impulse is strong in inten' sity, and acts upon the receiving relay to close an additional or shunt circuit (through contacts 7i573) from the local hatter; to the printing magnet in the receiving instrument.

The machine operates entirely by local battery current and with exception of keyboard has no electricalconnection whatsoever with the main line or source of main line energy. The keyboard directly controls the main line and to a limited extent the lopal battery currents. The main line currents are used only to control the action of the relays, and the relays directly control. the action of the local battery currents, while the local battery currents control the electrical operation of the machine.

By the use of positive and negative impulses, the printing plate 6 and universal type-bar 5 are so arranged that the normal position of the printing plai Q in relation to the platen is such that its center is always normally presented to the platen, arm 7 stands over the central neutral section of the commutator segment. T his arrangement is preferred for the reason that the distance/to be traveled by the printing plate 6 in coming to any desired character is short as compared with starting the type segment at one end and causing all movements of the type segment to be in one direction. This results in a great saving in time in positioning the printing plate, since its travel approximately only one-half what it would be if impulses of one polarity were used and the priiiting plate 6 always swung in one direction from one end of the segment The type segment or printing plate (3 and arm 7 are held in normal central position by suitable means. as the springs 80, and the field magnets 99' act in opposition to these springs. The relay a rmatures 50 are maintained normally out of contact with the switch members 5'2-53, 73---75 by suitable means, as the springs 81. The type charactcrs, as shown in Fig. 8, are mounted upon the type-face plate 1') in three horizontal rows, the top row forming the lower case of characters which are normally presented in printing position in front of the platen 12. The capital letters form the central. or second row and the figures, punctuation marks, etc,

and the form the third or lower row;

filo

the characters being equidistant apart corresponding with the commutator sections 40. The characters in the three rows are arranged also in vertical series. The type-face is left blank at the center or normal position of the type segment to allow for spacing by means of the spacing-key 49, because it will be seen hereinafter that whenever the spacing-key 4-9 is struck. the type-bar 5 will rock forward on its pivots The arrangement of characters to the right and left of normal line position on the type-face. is such that the most frequently used characters have the shortest distance to travel, While other characters, like q :t"z, most infrequently used, are mounted toward the outer ends of the type-face plate. Starting with the normal central position of the type segment, the characters on one side of the center are selected by keys on the keyboards giving positive line impulses, and those characters on the other side are selected by keys on the keyboard giving negative impulses.

As before stated, the impulses on the line and in the local or field magnet circuit are variable in length, according to the -charac ter selected. The nature of these main line and local or field. magnet circuit impulses showing duration and strength is graphically illustrated in Figs. 12 and 13. The shortest impulse is for the selection of the character on the type-plate that is nearest to the vertical central blank space on the typeplate. either to right or left, according to the polarity of the impulse; the longest impulse used is for the characters at the extreme ends of the type-plate. Figs. 12 and 13 graphically represent the type-plate divided by longitudinal parallel lines into time units; the horizontal lines representing the compara ti re duration of the impulses to produce the various characters. In Fig. 12, the weak ini 'l portion of the main line impulse is rcprcscntoi'l by the narrower horizontal Tigurcs .9. while the stronger later portion of this main line impulse is represented by the thickened portions The first or weaker part of the main line impulse is variable in lcngth. according to the position ofthe type on the type-face, Whether nearer to, or farther from, the center of the type-plate; but the intensified or printing portion of the main line impulse. represented at 83, is of uniform length for all the characters. In Fig. 1 the horizontal lines 1 shop the lo cal field maszfnct circuit impulses of uniform stmngth. but of variali le length: the crosshatchcd portion S-l" corresponding to the local printing or shunt circuit through magncts 11- 11. The increase of strength in the main line. always comes at the latter end of the impulse. and is but momentary and of llXLd length, for the reason that. this last part of the illilltlai is used only to excite the printing magnet 1111, through the relay,

to action. In other words, the Weak portion of the main line current corresponds to the time that it takes the arm 7 to swing over the segment 8 to the section 40 Which corresponds to the key depressed; and the strong part of the main line current, represented by 83, Fig. 12. corresponds to the time that it takes the printing bar 5 to rock forward on its pivots 48 and print. after the arm 7 has come to the correct section 40. The local or shunt printing circuit is energized at the same moment the main line impulse is intensified, or as nearly so as the adjustment of the relay contacts 7'2---73 can be made to give this result. The neutral nonprinting portion on the type-plate is represented by the central vertical space 8."). Figs. 12 and 13.

The detail construction of the type-bar is more particularlv shown in Figs. 4, 5, 6 and 7. As seen in Figs. 3 and 5, the lower end of the type-bar 5 pivots on an adjustable set-screw 86 which is carried by the rocking frame 87 Which pivots on the pins 48. The frame 87 has a tubular upward extension 88 through which the rod 5 passes, being turnably supported on ball bearings 89, Fig. 5. The printing or type-plate 6 is carried on an arm 90 which turns with the type-bar 5, but is free to slide lengthwise thereon; a spline or equivalent connection on the bar 5 fitting a corresponding keyway in the hub of the arm 90. The type-bar 5 has a sidewise turning movementin the frame 87--88 and independent of the latter. and has also a rocking movement in unison with theframe EXT- 88. wh le the type segment 6 and its carrying arm 90 has, in addition to these two movements, an up and down or vertical movement corresponding with the operation of the shitt-key 45 to shift the type segment to bring one or other of the cases in printing position with respect to the platen 12. as will be shortly described. The aimatures 10 are supported on the type-bar so that the latter will swing in unison with the armaturcs. as

shown in Fig. o. and the arm 7 has a pivotal against a suitable stop. as an armature 10, to keep the brushes lW-lT in contact with the commutator segment 8. The shitting mechanism for the type segment 6 is shown more particularly in Fig. 6. l\'orn1all \"the type segment 6 stands with its top row. carrying the most used charac ters, opposed to thcplatcn. so that whenever a character key 2 is struck. a type in this top row will imprint on the paper on the platen. To obtain a character in the central or lower row it is necessary to raise the type segment either one or two steps upward. respectively This is accomplished by pressing thesbift-key' 4-5. Figs. 1 and 3.

Y hi ch r This key 315 actuates an electric shift device, Fig. 6, that sets up and h its the t e segment in the followin dv l manner:

"ed, the

12". t Whenever the slii'it-ln-y 111 is olenr; field magnets 9 --9 are ener xed swing the arm 7 to the right and bring the brushes 16---17orcr the end sect ons 1-. ."----l3' of the segment 8, The sections =12--jl3 are insulated from each other, and on of these sections is connected by a wire 91': Fig. 6, With one pole of the shift-nwchanism operating-magnet 94. The other pole of this magnet is connected with one pole of the local battery 38 by a Wire 9 and. the-other pole of the local battery 32*? is countered by a Wire 96 with tile other com niiutator section 42. When the brushes -15 4 7 swing on to the sections 4'2-43", these brushes art as a circuit closer to close the local rircuitthrough the magnets 1.1-1, Energizing magnet 91 pulls down on an ari'natnrc arm 97 do" 98 carries a spring-actuaiteil adapted to engage a notch 99 on lllil uh l: ,connectvdwith 2 the printing plate carrying arznfir rocating the rod. 100 causes a like tion of the hub 101 on the type; corresponding raising or 1, 'ill'ltll1g plate 6 without mrwernent of the bar 5 the ra suitably guided in twine and rocking with the-frame; the connection between the 'aclchar 190 nihilltili W1 heing loose, so as to allow the huh and tynwnlate (l to turn sidewise inrleneivient the. reels:- har 1.00. A single impulse, through the mag net 94 results in one St?) 13; of the raclclmr 100. lifting the raclr or oueste'n causes a sprin dog 1053 to engage a. notch 1 .15% on the rack-iii who hold the latter in elevate! tion A secoml impn 1e ine to a. swond de pression of, the shift re u ts in a secondstep up of tln :h 1 3' bring!- nnntmg {Hate 6 ing the lower case i into printing: I )liflt-lfl! 10 are held an catching in a wvond not: '10" pivoted between l 6, '1

to press one dog int- 1 the '2 e notcl'ws lUfl -"ltfl. The other log in line with lease-liar 10+ til. ,7 l0? ennageahle by 108. A l" er printing ilic segment s automativally rel to ihi l ion position 11;." universal t rpehar re thrmigrh th medium o H leasing liar il i, lia i= 1:, gaged by the forked end carried by the rocking 'fr-mw type-liar and runnyprint, the raclcli-ar i V rock forward in ti: e frame 87 -88, and the arm 110 pulls the releasing bar 106 outward so as to cause it to catch in one or other of the notches 107. \Vhen t e frame SL-S8 rights itself. it leaves the bar 106 sticking out so that it hits the spring end of the dog 102 and rocks it, thereby releasing-the rack bar 100 so that a spring 111 can pull the rack-bar and type-plate 6 down again to initial position.

In order to obviate noise and prevent shock when the frame and type-bar return to initial position, I employ a shock-absorbing spring 112, Fig. 6, which is adjustably acted upon by a set-screw 113.

in order to lock the type-plate when printing, and insure proper alinernent of the type, I employ a segmental l0cking-plate 114 which is fixed to a hub 101 on bar 5, and turns withthe type segment 6, and is of about one-half inch shorter radius than the type segment. The peripheral edge of this locking-plate 111 is serrated, or suitably formed with V-shaped notches, WhlCl'l'ldttBI vonfornz in their position to the vertical rows or type on the type segment. Directly and "centrally in front of this plate at a point approximately coinciding with the normal position of the type segment is a tationary vertical pin 115 also V-shaped in rrosssection. correspomling with the V- shaped notches in locking-plate 114. This pin is placed about one-sixteenth of an inch from the peripheral edge of the notched plate when the type-bar stands vertical and inhion-printing position, so that when the plate is oscillated horizontally the pin offers no obstruction to this free lateral movement.- l'lf/KYQl. the moment that the local battery circuit, hel'ore described. has clnseifhthrough the brushes 4 7 l? and the commutator segment 10, so as to oscillate the frame 87 88 1 print, the notched plate 114 is also tilted forward and the notch in the p ripheral edge of the plate corresponding to the character on the key denre a ed on the keyboard shrougiit into engagement. with the stopin 1.15. thus arresting and locking the uni- 'erszil typehai and preventing further lat rul nmtion o? the t me segment (i. The in- :linml surfaces oi the notches and pin 115 on etc to insure perfect alincrnent of the clmra ters when printing and also to cor- "vet-t small diil'crenrcs in the synchronous movement of the type segments. Between the convcxml surface of the type-plate 6 and the platen roll is remorahlv fixed a concaved velvet inlepad 116, Figs. 7 and 8, normally rl'fllkilllltt'l fr m the type-face. The center in the ml pa-zl ifwiitiSpfin-llllig to the central large enough to allow the free passage of a type, so that the type protruding thereno nigh will strike the paper on the platen and print whenever the type segment is rocked forward. This forward motion of the type segment also accomplisl'ies the ink-- ing of the types by bringing the convexed typwface into contmt with the concaved inking-pad.

119 is the carriage which carries the platen roll. and (his arriage is suitably 10 mounted f r reciprocation so to cause the platen roll to traverse the type-face. and its movement in one direction is accomplished by any suitable means welbknown in the art and hereinafter explained. As here shown, the carriage is operated in one direction by means of a spring drum 150, Fig. 4, to the interior of which is connected one end of a tape 151: the opposite end being attached to the carriage. Secured'to the carriage is a rack 152 into which meshes a pinion 153 upon the vertical shaft 154. near the lower end of which latter is an cseapement-wheol 155 providing for step by step movement. The ontrolling means consists of a duplex dog 156. one member of which 1.56 is rigid on the vertically movable shaft 157;the moving member being located above the fixed member and loosely pivoted on the vertically moving shaft 157; and by said vertical movement the pivoted doo is shifted out of contact with the teeth of the escapementwheel 155 and advanced one tooth through the action of a spring 158. 'The. vertical moving shaft 157 is held against rotation and is operative in both directions by means of a bell-crank 159 and link connection 160 to the rocking frame 87, the spring 161 surrounding the shaft serving to hold the same down. Thus each time the type-bar 40 and its frame rocks back to normal upright, from forward printing or spacing position, the (log: 15b is shifted to allow the carriage to progress on! step movement to the left. The carriage irturn movement is accom- 56 plished by the depressing of a special carriane-return-key 120 at the left-hand side of the keyboard. Depressing key 120 re sults in energizing the field magnets 9-9 in the manner prr xiouslv described. to cause 0 the arm T to suing to its limit to the left and ring the brushes lb--47 over the com iuutator ections li l l.

shown in Fig. 10, bridging the gap bet vcen the sections 12 t; by the brushes Mi i? loses a circuit to the motor 44: section being connected by a wire 121 with one. pole of the motor. the other pole of the motor being nn rled bv a Wire 1272 with one member; 1'23 of a normally closed switch. The ther iuember of this switch is connected y a wire 11?} with the local battery 3%. The armature of the motor is mounted on the motor shaft 125, which shaft and armature have a limited lengthwise movement within the field ofthemot 'ir.

The armature is so positioned with respect to the field that when the field is energized it will so react on the armature that the latter drawn-ism central position in the. field, ausing the arnniture to shift from the full line. or normal inert position, Fig. 10, to the dotted line. or active position of the rotating parts. This will cause a corresponding lengthwise shifting of the motor shaft 125. Shaft 123 carries a broad gear lit? meshing a gear iii-T vhich is mounted loose on a. counter-shaft 128. being yieldonly hold thereto by means of a spring I 129 which has one end secured to the loose gear 127. and the other end fixed to the shaft 128. Fig. 11. Thus it is seen that mo tion is transmitted from gear 127 to shaft, 128 through the medium of the spring i29. Splined on to the shaft 129 is a clutch collar 130 which turns with the shaft and. slides lengthwise on it and is operated by lever 131 fulerumcd at 1,31 and loosely c0nnerted with the shaft 125, so that the lever 131 is mo ed back and forth COI'I'QSpODdingwith the hingrthwise movement of the shaft 12 to carry the clutch member 130 into and out of engagement with a corre sponding clutch member 133 which is loose on shaft 198 and carries a pinion 131 mesh ing a rack 135 on the platen carriage 119. The carriage 11 has a rail 136 on which an adjustable trip or cam 13? is adapted to contact with the, hell-crank switch member 193 and interrupt the motor circuit, so as to cut out the motor and stop the further return movement of the carriage.

The operation of the carriage-return is as follows: Depressing the carriagereturm key 120 causes the arm 7 to swing to the left and bring the brushes UL-47 over the commutator sections Assuming that the carriage. 119 is moved to the left, so that the cam or trip 137 is out/of engagement with the switch member this switch mem her 123 is then in closed position by reason of the action of the spring 1738 to close the motor circuit at this point. The brushes l i -li close. the motor circuit across the sec tions 42-l-f. The moment the field of the moto is enern'iyed the armature is pulled to the right into central position with respe'l t the field, shifting the shaft 125 to he right. rocking leverlill. and. throwing in the clutch BO -133. This endwise more lllillt' of. the shaft 125 has the further func lion of closing a shunt cireuit through the switch members 139XJand wires 140-141 which lead around the sections 42-43. This shunt circuit is for the purpose of keeping the motor circuit closed after the pressure is r leased on the carriagereturnkey 120, because the moment the key 12 is released, arm 7 swings back to central neutral position, uncovering sections 42%3. S tting the motor in motion causes the shaft lliti 128 to revolve, and the gear 134 acts on the rack 135 to wind the carriage 'back to the right, or until the cam or detent 137 on the carriage comes into engagement with the switch-lever 123 mounted on the frame independent of the lever and carriage: As soon as the ram 137 hits the switch lever 123' the motor circuit is interrupted at this point, thereby shutting off the motor,'and a spring 142 acts. onfle ver 131 to throw out the clutch 130 and return the armature to initial full line position, shown in Fig. 10. The cam or trip 137 is adjustably mounted on the rod 136 so that it can be slid alon the same and clamped wherever desired to reak the circuit and stop the carriage-return. Of course, the moment the clutch 130 is thrown out, the shunt'circ'uit through 140-141 is interrupted, and the motor is not started up again untilthe switch arm 123 is again in contact with its button, and the brushes 46-47 are brought over the sections 42-43. The spacing is controlled from the key 49 in a precisely similar manner as the regular keys on the keyboard, the section 40 which it controls being central of the commutator segment 8 so that there is no sidewise oscillating movement of the arm 7, but there'is a forward and'back rocking movement of the universal type-bar 5 and its frame 87-88. No printing takes place, however, when the bar 49 is depressed, for the reason that the center of the type segment 6 is blank, as previously described.

Briefly, the operation of the machine,

. when manually operated, is as follows: The

switchesj'13-14 are first set to the transmitting position in the sending machine, and to the receiving position in the receiving machine,'represented, respectively, at left and right of Fig. 2. Pressing a left-hand key 2 starts a positive current impulse to the line through the coils of the relays'B-S, which relays 3-3' in turn move their armatures 50-50 and bring the spring tongues 51-51 of the same into contact with the local battery of eachmachine, so that a positive current flows from the local battery, energizing simultaneously the positioning fields 9 9 of both machines, swinging both .type segments 6 in unison to the required position, when automatically a" contact is made in the transmitting machine by means of the traveling brushes 46-47 through a section 40 and the back section 41of the commutator 8, resulting in the establishing of a circuit from the local battery 38 to the rinting magnet 11 and energizin the same. fnstantly the light armature 63 o the sending machine'is attracted, which acts to'cut in the extra set of cells 64 in the main line battery, thereby increasing the pressure or tension of the current impulse already flowing on the line. This extratension acts on the armatures of the relays to further move ing the same and simultaneously printing in unison with the transmitting machine. Depressing the shift-key 45 once, will lift the printing plate 6 one step to print capitals or other characters on the middle case, and depressing the key 45 twice in succession, will lift the printinplate 6 two steps, so as to print from the Tower case. To return the carriage, after-completing its travel to the left, depress ,key 120 which swings the arm 7 to the left, bringin the brushes 4647 over the sections 42-4 and cutting in the motor. The motor circuit is maintained then automatically by means of the switches 139 until the cam 137 on the carriage strikes a switch lever 123 and cuts out the motor.

It is manifest or possible that the construction herein specified may be varied without departing from the principle of the invention, and I desire it to be understood that theinvention is not limited to any specific form or arrangement of parts, except in so far as such limitations or their mechanical equivalents are specified in the claims.

, Having thus described my invention, what Iklaim and desire to secure by Letters Patent is 1. In a printing telegraph, the combination with a sending and receivin machine, of a main line wire, a polariz'e relay at each end of the line, a local circuit in the sendin machine controlled by the relay at that en and a local circuit in the receivin machine controlled by the relay at that en printing mechanism in said local circuits, each of said printing mechanisms including a horizontally oscillating printing plate, a vertical shaft upon which said plate is rockable from side to side ofits center, said printing plates each having a rocking movement transversely of their paths of oscillation, a key board for each machine. and electrically operated mechanism controlled by a key for successively oscillating and rocking a corresponding printing plate, said last-named mechanism comprising a single character printing magnet common to all the charactors to be printed and acting directly upon the printing shaft carrying the print- Tng plate and arranged in a single common circuit.

2. In a printing tele raph, the combina tion with a sending an receiving machine, of a mainline wire, a'polarized relay at each end of'the. line, a local circuit in the sending machine controlled bythe relay at that end, and a local circuit in the receiv ing machine controlled by the relay at that end, printing mechanisms in said local cir-- cuits, a. keyboard "for each macnine, and selective mechanism for each keyboard and its printing niccliunism whereby on the dc pression of a particular key in one machine the proper character will be made to print in the other machine. said selective mechanism in the receiving machine controlled by a tuo-strength main line current.

3. In a printing telegraph, the combination of a sending mechanism. a receiving mechanism, a main line connecting the send ing and receiving mechanisms, each of said mecl'ianisms including a horizontally oscillating printing plate, a vertici l. shaft upon which said plate is mounted and rockable back and forth to one side or the other of its center, each of said plates having, also, a movement transverse to its plane of oscillating movement, and electrical mechanism controlled by a key in one machine for oscillating and rocking both of the printing plates synchronously, said last-named mcclianism comprising a single character print ing magnet common to all the characters to be printed and acting directly upon the shaft carrying the printing plate, and arranged in a single common circuit.

4. In a printing telegraph, the combination of a sending mechanism and a receiving mechanism, a main line connecting the two mechanisms, said mechanisms each including a horizontally oscillating printing plate, each of said plates also having a movement transverse to its plane of oscillation. electrical mechanism controlled by a key in one machine. for oscillating and rocking both of said printing plates synchronously, means for sending twostrength impulses over .he main line, means by which one strength of said main line impulse prepares the system for printing and means by which the other strength of said main line impulse effects the printing.

5. In a printing telegraph, the combination of two printing mechanis'sms remotely situated from each other, each of said mechanisms having a horizontally oscillatii'ig printing plate, each of sa d plates also having a movement trans e se to its plane of oscillation, a main line circuit. relays at the ends of said main line circuit. local cir cuits connected with said relays and in which local circuits said printing plates are interposed, said printing plates oscillating and rocking in unison, means for sending impulses of two-strengths over the main ne, means by which one strength prepaies the system for printing, and means by which the other strength effects the printing.

3. In a printing telegraph, the combina tion ot two printing mechanisms remotely situated from each other, a main line cir' cuit, relays at the ends of said main line circuit. local circuits connected with said relays and in which local circuits said printing mechanisms are interposed, said print- U ne: lillllf-UIS (21L comprising a printing plate having a sideaise rocking motion and also a nnition in a vertical plane, means for sending an impulse of two strengths over the main line, means by which the first or initial str ngth rocks the printing plates sidewise un son, 'iid means by which the second st. ength rocks the printing plates in vertical planes.

1''. in a printing telegraph, the combination of two printing mechanisms remotely situate jl from each other, a main line circuit, relays at the ends of said main line circuits, local circuits connected with said relays and in which local circuits said printing mechanisms are interposed, said printing mechanisms each comprising a printing plate having a sidewisc rocking motion and also a motion in a vertical plane, means for sending an impulse of positive or negative character over the line, means by which on the sending of a positive impulse said printing plates rock in one direction sidewise, and in an opposite direction when'a negative impulse is sent, means for intc sifying a portion of the impulse sent over the main line, and means by which the intensified portion of said impulse will operate to rock the printing plates in vertical planes.

8. In a printing telegraph, the combina tion of a sending machine and a receiving machine. a main line between the machines, each of said machines having a horizontally oscillating printing plate, each of said plates also having a movement transverse to its plane of oscillation. a sending key, electrical mechanism controlled by a key in one machine for oscillating and rocking both of said printing plates synchronously, said last named means being operated by a current of two strengths.

9. In a printing telegraph, the combination of a sending machine, a receiving machine, a main line connecting the two machines, relays in the main line. a local circuit in the sending machine controlled by its relay, :1 local circuit in the receiving machine controlled by its relay, :1 sending key, means operated by the key for sending an initial impulse over the main line. and other means independent of the key for intensifying the latter part of said impulse.

10. In a printing telegraph, the combination of a sending key, a main line circuit, means controlled by the key for establishing a circuit of one strength, and means connecting subsequent to the operation of said key to intensify the impulse in the circuit established by said key without breaking the main line circuit.

11. In a printing telegraph, the combinator segments in tion of a key, a main line circuit, two switches in said circuit controlled by --aid key, nieansfor closing the switches on the depression of the key, a local circuit coir. trolled by the main line circuit, and means controlled by the local circuit for intensity ing the impulse in the main line initiated on the depression of said key.

12. In a printing telegraph, the combination of a key, a main line circuit, means by whichon the depression of the key an impulse is sent over the main line circuit, a local circuit controlled by the main line circuit, and means controlled by the local circuit for intensifying the impulse in the main line initiated by the depression of said key.

13. In a printing telegraph, the conbina; tion. of a sending machine and a receiving machine, a main line circuit, a key on the sending machine, a local circuit in each ma chine controlled by the main line circuit. printing mechanism controlled by the local circuit in the receiving machine, means by which on the depression of the key an impulse issent over the main line circuit. means controlled by the local circuit of the sending machine for intensifying the main line imulse initiated by the depression of said key. and means by which on the intensifica tion of the impulse over the main line the local circuit in the receiving machine actuates said printing mechanism.

14. In a printing telegraph, the combination of a sending machine and a receiving machine, each machine comprising a universal sidewise-oscillating and vertically-reel ing type-bar, type-face on each type bar. a keyboard on the sending machine, commuta' each machine having sections corresponding to the keys of said keyboard. a brush carried by each type-bar and movable over its respective commutator segment, electrical connections and means whereby on the depression of a key on said keyboard the brushes are moved synchronously over the respective commutators into position over a commutator section corresponding to the key depressed, and electrical mea'iis acting subsequently to rock the type-bars in vertical planes to cause the type to print.

15. In av printing telegraph, the combination of a sending machine and a receiving machine, each machine comprising a universal sidewise-oscillating and vertically-rock ing type-bar, type-face on each type-bar. a keyboard on the sending machine. commuta tor segments in each machine having sections corresponding to the keys of said keyboard. a brush carried by each type-bar and movable over its respective commutator segment. electrical connections and means whereby on the depression of a key on said keyboard the brushes are moved synchronously over the respective commutators into position over a commutator section correspon ng to the key depressed. and electrical means acting subsequently to rock the type-bar's'in vertica planes to cause the type to print, said lastnamed means including a main line impulse of variable intensity.

16. In a printing telegraph, the combination of a sending machine and a receiving machine, each machine comprising a universal sidewise-oscillating and vertically-rocking type-bar. type face on each type-bar, a keyboard on the sending machine, commutator segments in each machine having sections corresponding to the keys of said keyboard, a brush carried by each type-bar and movable over its respective commutator segment, electrical connections and means whereby on the dep'ression of a key on said keyboard the brushes are moved synchronously over the respective commutators into position over a commutator section corresponding to the key depressed, and electrical means acting subsequently to rock the type-bars in vertical planes to cause the type to print, said lastnamed means including a main line impulse of variable intensity, and a local circuit impulse of uniform intensity.-

17. In a printing telegraph, the combination of a sending machine and a receiving machine, each machine comprising a universal sidewise-oscillating and vertically-rocking type-bar, type-face on each type-bar, a keyboard on the sending machine, commutator segments in each machine having sections corresponding to the keys of said keyboard,-

a brush carried by each type-bar and movable ovcr its respective commutator segment, electrical connections and means whereby on the depression of a key on said keyboard the brushes are moved synchronously over the respective commutator-s into-position over a commutator section corresponding to the key depressed, and electrical means acting subsequently to rock the type-bars in vertical planes to cause the type to print, said lastnamed means including a main line impulse of variable duration and variable intensity.

18. In a printing telegraph, the combination of a sending machine and a receiving machine. each machine comprising a uni' \ersal sidevvise oscillating and verticallyrocking type-bar, type-face on each type bar, a keyboard on the sending machine, con'imutator segments in each machine having sections corresponding to the keys of said keyboard. a brush carried by each typebar and movable over its respective commutator segment, electrical connections and means whereby on the depression of a key on said keyboard the brushes are moved synchronously over the respective commutators into position over a commutator section corresponding to the key depressed, and elec trical n'ieans acting subsequently to rock the type-bars in vertical planes to cause the type to print, said last-named means including min mising a tilliYCF- ll lill dil s: o and \ci'ticnlly i'oclv ii 7 much up, on}. o

l i rori'cspoi. ii i H lioziill, a lHl momhle over lis 71% mom electrical 1, whereby on tho dcpit keyboard tho ln-nshcs on" mowd synchro" non j: own tho roipvc connnntutoi-s into position over ciz-nnnntntor section com-0- sponding to tho logy -l sscll. and 01cc tiiczil moons ailing; onontly to l'UCiii tho typo-ha in ort" plrlnvs in muse thc time to 1niinl:.:=;iid lost" nmml moons inolmling :2 main lino in ing in duration hoot oiling to i" \lh'tnn" lira-wind by (he lu'nsh, said i1';: nzl'- living n'oalwi' din-inn lib pm'iol'l oi Uti ti o" the lirnsii and btl'UDQP during tlw moth i o ci'niion. :& l col (fll'Lllll in tho l'li 'llillig ii: cl w-iicilml n; tho intcnslilcel poi'tion ol soil 1min lino impulse. ano ti piinliv of the mrci vim i ll; in o pi'iini: lion of a Echoi g; nmchinm said sun; nnivcisz'zl shlcw lflllliiillfif. \rri'ti ':oii v rocking: t vpolt-mz {mic-incilllll l h the typo-bin, an zn-m l'ii iilllfi sillcix'iw in unison with tho 'qpolmi find hurrying :1 hi i :i lacyhoznd. con film sl-g nwnl. diudcd hop to llw loos on which raw-lion said ii'auil ironli'ollvrl wntmlhvl iointlv i "\!il'. a printing in mot in t. i. ogmmiw on llh type-how to i'w ill n i zli'wl -lnnc. owl lncnns for ()iil'l'tilillff iiw nwivizig muchino svnr-hi'ononsly i' e :kl'iwli oi the sending min'hinon {in fl 'ln'rsslon of :1 lwy. ill. in :1 nlntinf i nip-l tho combininli'n ' no including 'niiicallp '0 mo'riul in the so in unison owning n 'oi'ns n n worm-m (lii'idod spmniinn' in tho laws on 2 Cl'jililllll lhtnl' so;

and

i zc com (ion of a sum machine. 1111 i i'oiszzl r cking it; typo-luv. will; the t .';i P-lnzl" lcoihoiird. n int-1: sccti ns con;

I 51 local and mom or magnet in the ion; l cn'onii Minx moms to;- ope ating the receiving machine syn-chrononsly with the operation of the swirling nmchino on ll 0 depres ion of :1 key, wi l lost-nomml means including main line iml'mlsow' oi" variable (lln'ution and 'mi'iahlo intonsii'y.

in n printing telegraph, the conil'inm ion of o smnling nmchine and a rccoiiing 1 hino. ill scnjling machine including nnh'm-sul sidvivise-oscillnting, vertically locking typo hm. typeone cm'riod by Tin? typo l ar, an arm rocking sidcwise in unison with the typc-l ar and *nrrying n i nsh. 41 liQVlHHHK'iK o commutator sogn cnt fl 'iili zl inlo scctions corresponding to the ko vs on the keyboard and over which s ctions sold lnnsh travels, a main line cir coil controllvd h tho kc a local circuit mntrollml jointly by tho key and main line circuit. a printing nmgnct in the locil circuit opm'otivc on tho typo-hm to rock it in n x'evtiml piano and means for operating tho rcrrv ving machine synchronously With the opvmtion of lhcscnding machine on the (lqnW-siufl ot a key. said last-named means including nmin lino impulses of two stwngths. tho initial strength corresponding to the travel of ljlio ln'nsh ovci the COYYIIIlIlmroi' s -ctlons. and tho other strcngth corn-spoolling' to the period that it: takes the l on lmr' to rock Vertically to print after the msh comes ovo a section corresponding to the key depressed.

lo a printing tclegoph, the cornhi alion of 1 sending machine and a recoiving machine" said sending: machine including :1

nni 'Jwisnl sillmvisc oscil lniing vorticallw rocl' if typohn" typo taco carried by the 

